TPA2026D2 single inputs

jorge.ramirez

Other Parts Discussed in Thread: TPA2026D2

Hi,

I'm using the TPA2026D2 but my inputs are single instead of differential. Should I just ground INR- and INL-? Is there a recommended configuration for this case?

Thanks!

Jorge.

over 12 years ago

0 Don Dapkus over 12 years ago

TI__Guru**** 189401 points

Hi, Jorge,

Sorry we didn't include this use case in the d/s, and the EVM Users Guide is actually very misleading...

The correct thing to do is to ac-ground the unused inputs thru the same impedance seen by the used inputs. Otherwise, there will be a differential voltage generated at start-up which will result in a turn-on pop.

Tying the inputs directly to ground (without a series cap) will kill the internal bias of the part...

-d2

0 jorge.ramirez over 12 years ago in reply to Don Dapkus

Prodigy 20 points

Great! Thanks for the quick response, Don! Everything is clear now.

Jorge.

0 avraka over 11 years ago in reply to Don Dapkus

Intellectual 855 points

Dear Don.

In case of Single Ended usage, what is the guaranteed maximum speaker output power from TPA2026D2 at a given 5V and 4 Ohm speaker load?
Can I assume the output power is almost half of differential input ?

Thanks & BR

0 Don Dapkus over 11 years ago in reply to avraka

TI__Guru**** 189401 points

Hi,

As long as your input signal is large enough, and you have enough gain, the output power capability will be identical to the differential input case.

-d2

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TPA2026D2 single inputs